Quick Overview

Count cross-array index pairs whose values add to a target, with duplicates contributing their full multiplicity. Use complementary frequency counts or an equivalent linear-time approach that handles empty arrays, negatives, and results larger than either input.

Count Cross-Array Pairs with a Target Sum

Company: Visa

Role: Software Engineer I

Category: Coding & Algorithms

Difficulty: medium

Interview Round: Online Assessment

Overview: Count cross-array index pairs whose values add to a target, with duplicates contributing their full multiplicity. Use complementary frequency counts or an equivalent linear-time approach that handles empty arrays, negatives, and results larger than either input.

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